These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: PHA - written on slides, likely photographer was Peter H. Ashenhurst.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: PHA - written on slides, likely photographer was Peter H. Ashenhurst.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: PHA - written on slides, likely photographer was Peter H. Ashenhurst.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: PHA - written on slides, likely photographer was Peter H. Ashenhurst.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: PHA - written on slides, likely photographer was Peter H. Ashenhurst.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: PHA - written on slides, likely photographer was Peter H. Ashenhurst.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: JMH - written on the slide, likely the photographer, not sure who JMH is.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: JMH - written on the slide, likely the photographer, not sure who JMH is.

These slides had a date on the slide mount, 1979 08, for the Marsh building construction at the Hamilton Centre Observatory. Not sure when actually taken or when developed. Abbreviations: CG - written on the slides, likely Clive Gibbons.